In the legendary past, the gods battled for supremacy and cast out the demon god whose name cannot be spoken.

Banished to Earth, the demon found refuge on the mysterious and dangerous island known only as "G." After experiencing a crisis of faith, Father Olivier of the Valaria Order decides to go to G and find out the truth behind the legends. Olivier's journey is unsanctioned, and the head of the Order engages the dark elf Suzu to stop him. As he begins his quest, Olivier encounters Ohri, a young girl from the south who cannot speak.

As this unlikely pair travels toward their destination for very different reasons, they are shadowed not only the agents of Olivierís order but the by the enemies from Ohri's past...